row-split and column-split don't work as expected in chart command

[ronja-ui]

Describe the bug
The row-split and column-split don't work in expected way with chart command.

Expected behavior
row-split:

%dpl
index=crud earliest=-4y
| spath
| chart sum(balance) over _time

produces:

_time	sum(balance)
2021-01-09 15:12:24.0	691.546
2021-01-09 15:12:33.0	133.126

row-split and column-split together:

%dpl
index=crud earliest=-4y
| spath
| rename count AS countOperation
| where countOperation > 0
| chart sum(countOperation) by success operation

produces:

operation	false	true
update	366127	32919197
read	349684	32976172
create	287927	32600522

How to reproduce
See the Expected behavior section's code snippets, run them and inspect results.

Screenshots

Software version
pth_10 version: 8.3.1
pth_06 version: 3.3.4
pth_03 version: 9.3.0

Desktop (please complete the following information if relevant):

• OS:
• Browser:
• Version:

Additional context